What is the Transmittance Calculator?

The Transmittance Calculator determines how much light passes through a material by comparing the transmitted light intensity (I) to the incident light intensity (I₀). It uses the simple formula T = (I / I₀) × 100 to compute the transmittance percentage, showing how transparent or opaque a sample is. After entering the required values, the calculator instantly displays the light transmittance in percentage form, helping students, teachers, and laboratory users analyze optical properties, validate experiment values, and understand how different materials interact with light.

How to Use:

1. Enter Incident Light Intensity (I₀): Add the initial light intensity before passing through the sample.
2. Enter Transmitted Light Intensity (I): Type the intensity measured after the light passes through the material.
3. Click “Calculate”: The calculator computes the transmittance using the ratio I/I₀.
4. Review the Result: Use the transmittance percentage to analyze transparency, compare samples, or verify lab data.